EMISSION CONTROL(1).pdf

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2004 Toyota RAV4
2004 ENGINE Emission Control - RAV4
2004 ENGINE
Emission Control - RAV4
EMISSION CONTROL SYSTEM
PURPOSE
The emission control systems are installed to reduce the amount of CO, HC and NOx exhausted from the engine
(3 and 4). They prevent blow-by gas containing HC from being released into the air (1) and evaporated fuel
containing HC from being released from the fuel tank (2).
The functions of each system are shown in
Fig. 1
below:
Fig. 1: Emission Control System Function Description
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
PARTS LAYOUT AND SCHEMATIC DRAWING
LOCATION
2004 Toyota RAV4
2004 ENGINE Emission Control - RAV4
Fig. 2: Emission Control System Parts Layout
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DRAWING
2004 Toyota RAV4
2004 ENGINE Emission Control - RAV4
Fig. 3: Emission Control System Drawing
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM
INSPECTION
2004 Toyota RAV4
2004 ENGINE Emission Control - RAV4
1.
INSPECT PCV VALVE
a. Disconnect the PCV hose from the PCV valve.
b. Remove the PCV valve.
Fig. 4: Disconnecting PCV Hose From PCV Valve
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Connect a clean hose to the PCV valve.
d. Inspect the PCV valve operation.
1. Blow air from the cylinder head side, and check that air passes through smoothly.
2004 Toyota RAV4
2004 ENGINE Emission Control - RAV4
Fig. 5: Inspecting PCV Valve Operation For Blowing Air From Cylinder Head Side
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
CAUTION: Do not suck air through the valve. Petroleum substances
inside the valve are harmful.
2. Blow air from the intake manifold side, and check that air passes through with difficulty.

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